By-pass thermostat valve mechanism



July 15, 1941. L. M.'PAYNE BY-PASS THERMO STAT VALVE MECHANISM a inFiled Aug. 13, 1938 m r rr I N INVENTOR. LAMBERT M. PAYNE M 4VW4%7ATTORNEYS closed position.

Patented July 15, 1941 UNITED STATES PATENT orrlc's BY-PASS THEBMOSTATVALVE MECHANISM I Lambert M. Payne, Detroit, Mich. Application August13, 1938, Serial No. 224,80 7

3 Claims. v (Cl. 236-34) This invention relates to thermostatic valvemechanisms of the by-pass types such as are parts shown in the drawinghereof, wherein Fig. 1 represents a vertical medial sectional viewthrough my improved thermostatic valve device,

as it appears installedon the head of an internal combustion engine andwith the by-pass valves in open position; and Fig. 2 a sectional viewtaken on the line .2-2 of Fig. 1, showing the bellows in elevation andthe by-pass valvesin One of the thermostatic valves of the type shownand described herein comprises a casing having a cylindrical skirtprovided with openings in the wall thereof for the circulation of waterthrough the-by-pass circuit, with valve members carried by the. top ofthe bellows and adapted to slide in contact with said skirt as thebellows expands and contracts, thereby to control the flow of liquidthrough the said openings. Due to the fact that the valve memberscontact with the skirt throughout their entire movement, they are liableto adhere to the skirt and thereby impair the efficient operation ofthe'valve mechanismin controlling the flow of the cooling liquid throughboth circuits. Due to the construction shown and described herein, I amenabled to overcome the objections noted andto accomplish this object inand through a relatively simple and inexpensive installation.

Describing the parts herein by reference characters, I represents apartof the head of an internal combustion engine, the sar'nebeingprovided with an openin 2 communicating with 3 is secured to theengineliead in any ved manner, as by lugs 3' and bolts I. casting-isprovided with an annular chem"-- unicates with the opening 2 and with aconnection 6 through which cooling liquid from the engine is conductedto the radiportig 2' of thevwater-jacket circuit. An out-' ator; alsowith a by-pass hose connection I through which the cooling liquid iscirculated in the usual manner. 8 denotes a gasket which is interposedbetween the base of the casting 3 and the engine head.. The base of thecasting 3 is also provided with a radially inwardly projecting flange 9provided with an annular seat 9 for the reception of an outturned flangeIt] on the bottom of the frusto-conical skirt ll of the valve casing ofmy thermostatic valve device,

the bottom of the flange Ill being held in engagement with the innerportion of the gasket by the upper wall of the seat 9.

The valve casing comprises; in addition to the flange Ill and the skirtII, a shoulder l2 extending radially andhorizontally inwardly from thetop of the skirt and a cylindrical neck l3 extending upwardly from theinner edge of said shoulder, the neck projecting above a flange 3extending radially inwardly from the outlet casting 3 and being spacedfrom the inner edge ofsaid flange. A gasket I4 is interposed between theshoulder l2 and the bottom of the flange 3F,

thereby to prevent any circulation of liquid beneath the said flange andaround the outside of the neck I3. The y-pass connection 1 communicateswith the chamber 5 below the flange wardly,

' wall 0! the skirt l I.

l5 denotes a sheet metal stirrup which is suspended from the horizontalshoulder or flange l2, said stirrup comprising a pair of diametricallyopposed vertically extending straps [6 having their bottoms integrallyconnected with the disk I1 and their upper ends terminating in shanks 18which are inserted through and secured to the horizontal flange [2, asby riveting. The disk I! has sealed thereto the bottom of a bellows la,

the upper end of which is sealed by a disk 20.

This disk is provided with opposed arms 20 each having at its outer enda valve member 2|, each of said valve members being preferably formed bybending the arms upwardly and down- .the valve members thus formed beingeachin the. form of a frusto-conical segment and having their outersurfaces parallel with the The arms 20 are such length that the valvemembers'2l do not contact with the inner wall of the, skirt until theyshall have been moved upwardly by the expansion of the bellows asuflieient distance to enable the valve members to close the opposedopenings 22 inthe said skirt. By this construction and arrangement ofparts. I am able to overcome the binding and sticking of the prior artvalves to I which reference has been made hereinbefore.

an external thread upon which the valve 25*is adjustably mounted, bymeans of theinternally threaded sleeve 26.

21 denotes the central portion of a yoke, the said portion surroundingthe stud 23 and forming a guide therefor. Arms 28 extend outwardly fromthis guide portion and are provided each adjacent toits outer ,end'witha,slot for the passage of the shanks it of the straps l 6. The rivetingof the upper ends of the shanks It to the shoulder I! of the casinganchors the yoke in place so that it serves the double purpose ofguiding the stud 23 and limiting the'expansion of the bellows.

With the parts constructed and arranged as described, the operation willbe readily understood. When the cooling liquid of the engine isbelow apredetermined temperature, the valve 25 will be seated and the waterwill circulate freely through the interior of the skirt I I, theopenings 22 and the hose connection I to the water jacket of the motor.As the temperature of the cooling liquid rises, the valves 2| will bemoved upwardly by the bellows, gradually and finally completely closingthe openings 22, while the valve 25 will be correspondingly graduallyopened until, when it reaches its fully open position, as illustrated inFig. 2, the cooling liquid will circulate practically entirely-throughthe circuit including the radiator.

Having thus described my invention, what I claim is:

1. In a by-pass thermostat valve mechanism for controlling theflow ofcooling liquid for an internal combustionengine, the combination of acasing comprising a frusto-conical skirt, a substantially cylindricalneck extending from the smaller end of said skirt and provided at itsouter I end with a seatfor a valve, the said skirt being provided withopenings through the side wall thereof for the passage of cooling liquidto a bypass connection,.a thermostatic bellows, a stirrup for supportingthe ,bottomof said bellows and for suspending the-saidbellows from theupper portion of said casing, a'platesecured to the upper end of saidbellows. a stud connected with the upper end of said bellows andextending through the said plate, a valve adjustably mounted on saidstud and adapted to cooperate with the seat formed on the end of saidneck, and valve members carried by said plate, said members eachcomprising a frusto-conical segment the outer surface of which issimilarly shaped with the inner frusto-conical surface of said skirt andadapted to contact with said surface only when the valve members shallhave substantially closed the said openings.

2. In a by-pass thermostat valve mechanism for controlling the flow ofcooling liquid for an internal combustion engine, the combination of acasing comprising a skirt, the upper portion of the side wall of saidskirt flaring outwardly and downwardly and being provided with one ormore openings in such portion for the passage of cooling liquid to aby-pass connection, the lower portion of said skirt having a diameter atleast as great as that of the bottom of the flared portion-thereabove, asubstantially cylindrical neck extending from th smaller end of saidskirt and provided at its outer end with a seat for a valve, athermostatic bellows, a, stirrup for supporting the bottom of saidbellows-and forsuspending the said bellows from the upper portion ofsaid casing, a plate secured to the upper end of said belr-v lows, astud connected with the upper end of said bellows and extending throughand connected to the said plate, a valve adiustably mounted on said studand adapted to cooperate with the seat formed on the end of said neck,and valve members carried by said plate, said members comprisingafrusto-conical segment the outer surface of which is similarly shapedwith the inner frusto-conical surface of said skirt and adapted tocontact with said surface only when the valve members shall havesubstantially closed the said openings.

3. In a by-pass thermostat valve mechanism for controlling the flow ofcooling-liquidfor an internal combustionengine, the combination of acasing comprising a frusto-conical skirt, a substantially cylindricalneck extending from the smaller end of said skirt and provided at itsouter end with a seat for a valve, the said skirt being provided withopenings through the side wall thereof for the passage of cooling liquidto a bypass connection, a thermostatic bellows, a stirrup for supportingthe bottomof said bellows and for suspending the said bellows from saidcasing, a plate secured to the upper end of said bellows, a studconnected with the upper end of said bellows and extending through thesaid plate, a valve mounted on said stud and adapted to cooperate withthe seatformed on the end of said neck, and valve members carried bysaid plate, said members each comprising a frusto-conical segment theouter surface of which is similarly shaped with the inner frusto-conicalsurface of said skirt and adapted to contact with said surface only whenthe valve members shall have substantially closed the said openings. 1LAMBERT M. PAYNE.

